国内外普遍采用回弹弯沉值来表示路基路面的承载能力,回弹弯沉值越大,承载能力越小,反之则越大。通常所说的回弹弯沉值是指标准后轴载双轮组轮隙中心处的最大回弹弯沉值。在路表测试的回弹弯沉值可以反映路基、路面的综合承载能力。本文从弯沉值的概念入手,分析了路面弯沉的变化规律。 Springback deflection values ​​are commonly used at home and abroad to represent the bearing capacity of subgrade and pavement. The larger the rebound deflection value is, the smaller the bearing capacity is, and vice versa. The so-called rebound deflection values ​​refer to the maximum rebound deflection at the center of the standard rear axle-mounted dual-wheel set. The rebound deflection value measured on the road surface can reflect the comprehensive carrying capacity of roadbed and pavement. This article starts with the concept of deflection value and analyzes the variation of road deflection.